EP0208866B1 - Analyseur de gaz avec détecteur pyroélectrique à grande surface - Google Patents

Analyseur de gaz avec détecteur pyroélectrique à grande surface Download PDF

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Publication number
EP0208866B1
EP0208866B1 EP86106532A EP86106532A EP0208866B1 EP 0208866 B1 EP0208866 B1 EP 0208866B1 EP 86106532 A EP86106532 A EP 86106532A EP 86106532 A EP86106532 A EP 86106532A EP 0208866 B1 EP0208866 B1 EP 0208866B1
Authority
EP
European Patent Office
Prior art keywords
sheet
blackened
gas analyser
effect
piezoelectric
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP86106532A
Other languages
German (de)
English (en)
Other versions
EP0208866A3 (en
EP0208866A2 (fr
Inventor
Walter Fabinski
Josef Nevole
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ABB Training Center GmbH and Co KG
Original Assignee
Hartmann and Braun AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hartmann and Braun AG filed Critical Hartmann and Braun AG
Publication of EP0208866A2 publication Critical patent/EP0208866A2/fr
Publication of EP0208866A3 publication Critical patent/EP0208866A3/de
Application granted granted Critical
Publication of EP0208866B1 publication Critical patent/EP0208866B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/02—Details
    • G01J1/04—Optical or mechanical part supplementary adjustable parts
    • G01J1/0407—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings
    • G01J1/0437—Optical elements not provided otherwise, e.g. manifolds, windows, holograms, gratings using masks, aperture plates, spatial light modulators, spatial filters, e.g. reflective filters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/10—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors
    • G01J5/34—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors using capacitors, e.g. pyroelectric capacitors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
    • G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis

Definitions

  • an infrared gas analyzer is described with two large-area foils (for example made of polyvinylidene fluoride, polyvinyl fluoride or chloride) provided with a metal layer on both sides, which at Impingement of infrared radiation shows a pyrroelectrical effect and a vibration shows a piezoelectric effect, the side of the film facing the infrared radiation which can be acted upon by it being blackened and therefore showing a pyroelectric effect and, on vibration, a piezoelectric effect, and the other film cannot be acted upon by infrared radiation and therefore only shows a piezoelectric effect when shaken, and with an electrical connection of the two foils to compensate for the piezoelectric effect caused by the shaking.
  • the pyroelectric effect is normally used to the effect that the infrared rays striking the film are converted into an electrical signal which is a measure of
  • Pyroelectric layers for the detection of infrared radiation are known, cf. e.g. US-A-4367408.
  • the invention relates to a gas analyzer with a detector in the form of a large-area film which triggers a pyroelectric effect when infrared rays strike, depending on the concentration of the gas to be analyzed, in which this disadvantage does not occur.
  • the invention consists in the features of claim 1.
  • infrared rays are generated in the radiator 1, which pass through the measuring cuvette 2 and the comparison cuvette 3, which are equipped with the windows 4, 5, 6 and 7 which are transparent to infrared rays.
  • the measuring gas is fed through the inlet connector 8 and discharged through the connector 9.
  • the rays passing through the measurement cuvette 2 and the comparison cuvette 3 are modulated in phase opposition by the aperture 10.
  • the rays leaving the cuvettes 2 and 3 pass through the interference filter 11 onto the detector designed as a film 12, which consists in particular of polyvinylidene fluoride. A pyroelectric effect occurs on the film in accordance with the concentration of the measuring gas component passing through the measuring cell 2.
  • the clamp 13 is connected with a e.g. metal layer applied by vapor deposition; the counter electrode is formed by the thin metal layer 14 applied to the film 12 on the side facing away from the radiation.
  • the electrical signal that corresponds to the pyroelectric effect is generated at terminals 15/18.
  • a piezoelectric effect can also be triggered in the film 12, which is superimposed on the signal generated at the terminals 13 and 15 as a result of the pyroelectric effect and falsifies the measurement result.
  • the side of the film 12 facing the radiation is partially blackened, as can be seen in FIGS. 2 and 3.
  • Part 16 is blackened.
  • the part 17 is bare and coated with metal, preferably with gold. In this way, reflection of the incident infrared rays is ensured.
  • Parts 16 and 17 are electrically isolated from one another.
  • the piezoelectric effect removed at terminals 15/18 and the piezoelectric effect overlapping the pyroelectric effect at terminals 13/15 are fed to an electronic anti-parallel circuit in which they compensate for one another.
  • the blackened part 19 covers almost the entire surface of the film 12 facing the rays; only a narrow recess 20 is not blackened and has, isolated from the blackened part 19, a narrow tongue 21 which is metallized; preferably as Gold plating material used, which is applied by vapor deposition.
  • the metallized tongue 21 is connected to the clamp 18.

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  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Power Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Claims (6)

1. Analyseur de gaz à infrarouge avec un détecteur revêtant la forme d'un film de grande surface (12) muni sur ses deux faces, d'une couche métallique, ce film déclenchant lors de l'incidence de rayons infrarouges, un effet pyroélectrique selon la concentration du gaz à analyser, analyseur dans lequel la face exposée au rayonnement infrarouge du film (12) comporte une première partie (16, 19) noircie qui, lors de l'incidence des rayons infrarouges produit un effet pyroélectrique et qui, lors de secousses, produit également un effet piézo-électrique, ainsi qu'une seconde partie (17, 21) non noircie, isolée électriquement de la partie (16, 19), et qui réfléchit les rayons infrarouges sans déclencher' d'effet pyroélectrique, mais seulement un effet piézo-électrique en cas de secousses, tandis qu'il est prévu un circuit électrique dans lequel les effets piézo-électriques déclenchés par les deux parties du film, sont compensés.
2. Analyseur de gaz selon la revendication 1, caractérisé en ce que la face (14), opposée au rayonnement du film, est métallisée et constitue l'électrode commune (15) pour la transmission des effets nécessaires pour la formation du signal et déclenchés par les deux parties de film.
3. Analyseur de gaz selon la revendication 1 ou la revendication 2, caractérisé en ce que la pré- mière partie noircie (16) et la seconde partie blanche (17) isolées l'une de l'autre sur la totalité de la surface du film (12), viennent en prise l'une dans l'autre en étant réparties en forme de méandres.
4. Analyseur de gaz selon la revendication 1 ou la revendication 2, caractérisé en ce que la totalité de la face exposée au rayonnement du film (12) est noircie à l'exception d'une partie étroite (20) dans le milieu de la surface, dans laquelle est prévue une languette métallisée (21) isolée de la première partie noircie (19).
5. Analyseur de gaz selon la revendication 1 ou les suivantes, caractérisé en ce que la deuxième partie non noircie (17, 20) du film (12) est revêtue avec de l'or.
6. Analyseur de gaz selon la revendication 1 ou les suivantes, caractérisé en ce que les effets piézo-électriques, après préparation électrique, sont compensés dans un circuit électronique antiparallèle.
EP86106532A 1985-07-13 1986-05-14 Analyseur de gaz avec détecteur pyroélectrique à grande surface Expired - Lifetime EP0208866B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3525148 1985-07-13
DE19853525148 DE3525148A1 (de) 1985-07-13 1985-07-13 Gasanalysator mit grossflaechigem pyroelektrischem detektor

Publications (3)

Publication Number Publication Date
EP0208866A2 EP0208866A2 (fr) 1987-01-21
EP0208866A3 EP0208866A3 (en) 1987-07-15
EP0208866B1 true EP0208866B1 (fr) 1990-07-04

Family

ID=6275765

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86106532A Expired - Lifetime EP0208866B1 (fr) 1985-07-13 1986-05-14 Analyseur de gaz avec détecteur pyroélectrique à grande surface

Country Status (3)

Country Link
EP (1) EP0208866B1 (fr)
JP (1) JPS6215441A (fr)
DE (2) DE3525148A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4124116A1 (de) * 1991-07-17 1993-01-21 Iris Gmbh Infrared & Intellige Spektraler pyroelektrischer infrarotmotorsensor
DE19927466A1 (de) * 1999-06-16 2000-12-21 Volkswagen Ag Sensoranordnung zur Ermittlung der Sonneneinstrahlung in Kraftfahrzeugen

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0168611A2 (fr) * 1984-07-18 1986-01-22 Hartmann & Braun Aktiengesellschaft Photomètre

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1302592C2 (de) * 1960-06-03 1975-04-10 Office National D'etudes Et De Recherches Aerospatiales, Chatillon-Sous-Bagneux (Frankreich) Geraet zur konzentrationsbestimmung eines analysenstoffes mittels selektiver absorption modulierter strahlung
DD112174A1 (fr) * 1974-05-16 1975-03-20
DE2557237A1 (de) * 1975-12-19 1977-06-23 Maihak Ag Nachweissystem fuer ein infrarot- gasanalysengeraet
US4367408A (en) * 1979-01-17 1983-01-04 Sanyo Electric Co., Ltd. Pyroelectric type infrared radiation detecting device
US4355233A (en) * 1979-02-22 1982-10-19 Beckman Instruments, Inc. Method and apparatus for negating measurement effects of interferent gases in non-dispersive infrared analyzers
DE3014328C2 (de) * 1980-04-15 1984-01-12 Kernforschungsanlage Jülich GmbH, 5170 Jülich Vorrichtung zur Modulation der optischen Durchlässigkeit eines Strahlenganges
DD207766A1 (de) * 1982-06-10 1984-03-14 Junkalor Dessau Schaltunsanordnung zur ausschaltung des einflusses mechanischer erschuetterungen
DE3426472A1 (de) * 1984-07-18 1986-01-30 Hartmann & Braun Ag, 6000 Frankfurt Fotometer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0168611A2 (fr) * 1984-07-18 1986-01-22 Hartmann & Braun Aktiengesellschaft Photomètre

Also Published As

Publication number Publication date
EP0208866A3 (en) 1987-07-15
JPS6215441A (ja) 1987-01-23
DE3672407D1 (de) 1990-08-09
DE3525148A1 (de) 1987-04-02
DE3525148C2 (fr) 1987-11-26
EP0208866A2 (fr) 1987-01-21

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